/* Retain the established warm paper, olive and record-cover design. */
:root{--muted:#737668}body{line-height:1.6}button{touch-action:manipulation}nav button{font-size:13px;letter-spacing:0}.home-intro h1{font-size:clamp(40px,4.4vw,64px)}.home-intro>p{font-size:14px;max-width:260px}.home-feature-copy h2{font-size:38px;margin-top:28px}.home-feature-copy h3{font-size:29px;line-height:1.55;margin:20px 0 12px}.home-feature-copy .lv-primary{margin-top:12px;font-size:13px}.home-description{font-size:14px}.home-map-link{font-size:12px}.song-card{display:flex;flex-direction:column;width:100%}.song-card .art{width:100%}.song-card h3{font-size:17px}.song-card .card-question{font-size:18px;color:var(--ink);line-height:1.6;margin:17px 0 13px;font-weight:500;min-height:57px}.song-card .tag{width:100%;margin-top:auto;font-size:12px;line-height:1.8}.cards{gap:27px}.section-label small{font-size:12px}.footer-note button{padding:0;color:inherit;font-size:11px;text-decoration:underline}.song-heading{display:flex;gap:16px;align-items:center}.song-heading strong{font-size:16px;font-weight:500}.song-heading small{font-size:12px;color:var(--muted)}.song-navigation{display:flex;gap:5px;border:1px solid #bbc5a6;padding:4px;border-radius:5px;background:#ecefdf}.song-navigation button{padding:9px 14px;font-size:12px;border-radius:3px;white-space:nowrap}.song-navigation .selected{background:#34412a;color:#f2f6e7}.lv-breadcrumb{padding:23px 0;flex-wrap:wrap}.lv-breadcrumb>button{color:#444d39;font-size:13px;min-height:38px;white-space:nowrap}.topic-line{font-size:13px;color:#737b61;margin:20px 0 -6px;display:flex;align-items:center;gap:12px}.topic-line span{font-size:10px;border:1px solid #c2caaa;padding:3px 6px;letter-spacing:1px;flex-shrink:0}.guide-progress{max-width:840px;margin:28px auto 33px}.guide-progress button{font-size:12px;min-height:39px}.guide-progress button span{width:27px;height:27px;font-size:10px}.lv-story-grid{grid-template-columns:.9fr 1.18fr;gap:60px}.lv-instruction h1{font-size:clamp(30px,3.35vw,48px);max-width:none;letter-spacing:-1.5px;line-height:1.38;margin:21px 0 24px}.lv-task{font-size:16px;line-height:1.95;max-width:430px;color:#626952;margin:0}.instruction-bottom{border-top:1px solid var(--line);padding-top:20px;margin-top:32px;display:flex;gap:12px;flex-wrap:wrap}.instruction-bottom button{font-size:12px;color:#697852;padding:0;text-decoration:underline;text-underline-offset:4px;min-height:32px}.lv-workbench{min-width:0}.lv-deck{padding:23px 26px 20px}.deck-heading{font-size:12px;letter-spacing:.3px;gap:12px}.deck-play{font-size:15px;min-height:48px}.deck-play small{font-size:11px;line-height:1.6;max-width:230px}.deck-loop{font-size:12px;min-height:38px}.deck-foot{font-size:11px;color:#b5c3a2;margin-top:14px;min-height:18px}.wave-container{height:93px;margin:8px 0 18px}.wave-cursor{transition:none}.lv-wave i{max-height:83px}.mix-grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:17px;border-top:1px solid #4e5a41}.mix-grid button{font-size:12px;line-height:1.5;padding:9px 12px;border:1px solid #70805a;border-radius:4px;color:#d0dbc0;min-height:39px}.mix-grid button.selected{background:#e1eca8;border-color:#e1eca8;color:#29381e}.mute-controls{display:flex;gap:10px;flex-wrap:wrap;margin-top:13px}.mute-switch{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 15px;flex:1;min-width:130px;border:1px solid #c3ceaf;border-radius:4px;background:#e8eedb;font-size:13px}.mute-switch.off{background:#f5f1e8;color:#939887}.switch-track{width:34px;height:19px;border-radius:12px;background:#405532;position:relative;flex-shrink:0}.switch-track i{position:absolute;top:3px;right:3px;width:13px;height:13px;border-radius:50%;background:#ecf2db}.mute-switch.off .switch-track{background:#b4b9aa}.mute-switch.off .switch-track i{right:18px}.mix-note{font-size:12px;color:#717c61;margin:13px 0;line-height:1.8}.deck-tools{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:13px 0 0}.mark-button,.tap-button{padding:11px 15px;font-size:12px;border:1px solid #aebb95;border-radius:4px;min-height:44px;background:#e7edda}.mark-button:active,.tap-button:active{background:#cfdfa8}.tap-note{font-size:11px;color:#81876f;line-height:1.7}.tap-dots{display:flex;gap:4px;flex-wrap:wrap;margin-top:10px;min-height:9px}.tap-dots i{width:7px;height:7px;border-radius:50%;background:#5c773e}.user-mark{position:absolute;top:0;bottom:0;width:2px;background:#efb88a;z-index:2;pointer-events:none}.user-mark:before{content:'你的标记';position:absolute;font-size:9px;color:#efb88a;top:-10px;left:-20px;white-space:nowrap}.comparison-row{gap:10px;margin-top:15px}.comparison-row button{padding:15px 13px;min-height:92px}.comparison-row button>span{font-size:10px;margin-bottom:4px}.comparison-row strong{font-size:14px}.comparison-row small{font-size:11px}.compare-actions{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-top:12px}.compare-actions button{font-size:12px;border:1px solid #aebd94;border-radius:4px;padding:11px 13px;min-height:42px}.compare-actions button.playing{background:#34472a;color:#eff5df}.comparison-row.two{grid-template-columns:repeat(2,1fr)}.comparison-row.five{grid-template-columns:repeat(5,1fr);gap:6px}.comparison-row.five button{padding:14px 8px;min-height:98px;border-bottom:3px solid #b5bc9a}.comparison-row.five strong{font-size:12px}.comparison-row.five small{font-size:9px}.comparison-row.five button:nth-child(2){transform:translateY(-4px)}.comparison-row.five button:nth-child(3){transform:translateY(-8px)}.comparison-row.five button:nth-child(4){transform:translateY(-12px)}.comparison-row.five button:nth-child(5){transform:translateY(-16px)}.ladder-wrap{padding-top:24px}.compare-state{min-height:20px;font-size:12px;color:#6d7c55;margin:12px 0 0}.explain-wrap{margin-top:23px}.explain-toggle{font-size:13px;color:#4e6536;padding:8px 0;border-bottom:1px solid #adbe90}.knowledge{border-left:3px solid #abc274;padding:3px 0 3px 20px;animation:arrive .2s}.knowledge h2{font-size:20px;font-weight:500;line-height:1.55;margin:0 0 12px}.knowledge p{font-size:14px;line-height:1.95;margin:10px 0;color:#626c54}.knowledge details{font-size:12px;color:#6f7d5c;margin-top:12px}.knowledge summary{cursor:pointer}.lv-next-row{margin-top:27px;padding-top:21px;align-items:center}.lv-next-row .lv-primary{background:#34452a;color:#edf4dc;font-size:12px;line-height:1.7;max-width:85%;text-align:left}.lv-back{font-size:12px;min-height:40px}.takeaway{margin:24px 0 0;padding:20px;background:#e4ebd4;border-radius:5px}.takeaway span{font-size:10px;letter-spacing:1px;color:#72835b}.takeaway p{font-size:16px;line-height:1.8;margin:10px 0 0}.finish-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}.finish-actions button{font-size:12px;padding:12px 15px;border:1px solid #a6b78b;border-radius:4px;min-height:44px}.finish-actions button:first-child{background:#34472b;color:#eff4e2;border-color:#34472b}.finish-recs{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:25px}.next-card{padding:15px}.next-card strong{font-size:15px;margin:0 0 7px}.next-card p{font-size:12px;line-height:1.8;margin:6px 0 14px}.next-card small{font-size:11px}.map-title-row h1{font-size:36px;line-height:1.4}.map-title-row>p{font-size:14px;max-width:400px}.map-workspace{grid-template-columns:1.35fr 1fr;gap:26px}.map-inspector h2{font-size:24px;line-height:1.5}.map-inspector>p{font-size:14px}.sound-map{padding:25px 22px 18px}.map-lane{margin:17px 0}.map-lane>span{font-size:12px;width:58px}.lane-plot,.lane-plot svg{height:48px}.map-axis{font-size:11px;margin-left:73px}.map-number-row>span{width:58px}.map-number-row button{width:26px;height:26px;font-size:11px}.map-number-row{margin-top:22px}.sound-map>p{font-size:11px;color:#abbc94;margin-top:24px}.map-key{display:grid;grid-template-columns:1fr;margin-top:15px;gap:8px}.map-key button{min-height:54px;font-size:13px;padding:12px 15px}.map-key button>span{font-size:12px}.map-key small{font-size:11px}.map-key strong{line-height:1.6}.map-inspector .lv-deck{padding:20px 17px}.map-inspector .mix-grid button{font-size:11px}.map-inspector .wave-container{height:85px}.map-inspector .deck-play{font-size:13px}.map-inspector .deck-play small{font-size:10px}.map-inspector .comparison-row{grid-template-columns:1fr}.map-inspector .comparison-row button{min-height:55px;display:flex;align-items:center;gap:12px}.map-inspector .comparison-row small{margin-left:auto}.map-inspector .comparison-row.five{grid-template-columns:1fr 1fr}.map-inspector .comparison-row.five button{display:block;transform:none!important}.inspector-head,.inspector-head>button{font-size:12px;min-height:35px}.map-return{font-size:13px;padding:13px 16px;border:1px solid #9eaf85;border-radius:4px;margin-top:20px;display:inline-flex}.map-seek-wrap{display:flex;align-items:center;gap:15px;margin-top:19px}.map-seek-wrap input{flex:1;min-width:0;accent-color:#708c46}.map-seek-wrap button{font-size:12px;padding:11px 13px;border:1px solid #bac5a5;border-radius:4px}.map-seek-wrap span{font-size:11px;color:#73815d}.profile{margin-top:40px}.profile h1{font-size:43px}.profile-chart blockquote{font-size:22px}.profile-bars .row{font-size:12px}.profile-stats{display:flex;gap:35px;margin:25px 0}.profile-stats strong{font-size:36px;font-weight:500;display:block}.profile-stats small{font-size:12px;color:var(--muted)}.saved-moments{margin:30px 0}.saved-moments>button{font-size:14px;line-height:1.7}.saved-moments>button span{font-size:11px}.empty-state{border:1px dashed #bcc6a8;padding:24px;border-radius:5px;font-size:14px;line-height:1.8;color:#778568}.profile-home{margin-top:25px}.myear-question{font-size:13px;color:#758266;padding:12px 0;border-bottom:1px solid var(--line)}.player-title{min-width:150px}.player-title small{font-size:10px}.player-ask{font-size:12px;letter-spacing:0}.player-bottom{font-size:10px;letter-spacing:0}.volume{width:64px}#player .player-top{gap:18px}#player .player-btn{width:40px;height:40px}.time{font-size:11px;min-width:90px}.player-map{font-size:12px;color:#dbe6c7;white-space:nowrap}.drawer{width:510px;padding:32px}.drawer h2{font-size:29px;line-height:1.5}.drawer .fine{font-size:12px}.question-time{font-size:12px;color:#6c7a57}.suggestions button{font-size:12px;line-height:1.6;text-align:left;border-radius:4px;border:1px solid #ccd4bc}.drawer textarea{font-size:14px;line-height:1.8}.drawer .primary{font-size:12px}.answer{font-size:14px;line-height:1.9}.source-link{font-size:13px;line-height:1.8}.drawer-close{min-width:40px;min-height:40px;font-size:23px}.synth-panel{border:1px solid #c8d1b6;background:#e7ecd9;border-radius:6px;padding:23px}.synth-kicker{font-size:11px;letter-spacing:1px;color:#6a7b50}.synth-panel svg{width:100%;height:auto;display:block;margin:14px 0 10px;background:#f4f5e9;border-radius:4px}.synth-choices{display:grid;gap:9px}.synth-choices button{display:flex;gap:13px;align-items:center;text-align:left;padding:12px 14px;border:1px solid #b6c69a;border-radius:4px;font-size:13px;background:#f5f5eb;min-height:48px}.synth-choices button.selected{background:#33492a;color:#eff6db;border-color:#33492a}.synth-choices small{display:block;font-size:10px;color:#82916d;margin-top:3px}.synth-choices .selected small{color:#cfddb9}.synth-choices b{font-size:19px;font-weight:400}.synth-status{font-size:12px;line-height:1.85;margin-top:15px;color:#62754c;min-height:43px}.synth-legend{font-size:11px;color:#758465;line-height:1.8}.synth-dot.changed{fill:#ba632f}.synth-dot.active{stroke:#202b18;stroke-width:3}.synth-help{font-size:12px;line-height:1.85;color:#6f7d5f;margin:13px 0 0}.arrange-choices{display:grid;gap:9px;margin-top:16px}.arrange-choices button{font-size:13px;padding:13px;border:1px solid #b3c697;border-radius:4px;text-align:left;background:#e6edda;line-height:1.7}.arrange-choices button.active{background:#34472a;color:#f0f4e6}.arrange-choices small{font-size:10px;display:block;color:#7e8b6b}.arrange-choices .active small{color:#c4d4ad}.sequence-dots{display:flex;gap:6px;margin-top:11px}.sequence-dots i{flex:1;height:4px;background:#d5ddc7}.sequence-dots i.active{background:#6d8b44}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
@media(max-width:1050px){.lv-story-grid{gap:32px}.song-heading{display:block}.song-heading small{display:block}.home-feature-copy h3{font-size:26px}.cards{gap:20px}.player-title{min-width:125px}.map-workspace{grid-template-columns:1.2fr 1fr;gap:20px}}
@media(max-width:760px){header{height:76px}.brand{font-size:22px}.brand span{font-size:10px;margin-left:10px}nav{gap:18px}nav button{font-size:12px}.home-intro{align-items:flex-start;flex-direction:column;gap:20px;padding:32px 0}.home-intro h1{font-size:41px;letter-spacing:-2px}.home-intro>p{max-width:400px;margin:0;font-size:13px;display:block}.cards{grid-template-columns:repeat(2,1fr);gap:26px 16px}.song-card .card-question{font-size:16px;min-height:76px;margin-top:13px}.home-feature-copy h3{font-size:25px}.song-heading{order:3;width:100%;text-align:left;border-top:1px solid var(--line);padding-top:13px;display:flex;gap:14px}.song-heading strong{font-size:15px}.song-heading small{font-size:11px}.lv-breadcrumb{gap:12px;padding:17px 0}.song-navigation button{font-size:11px;padding:9px 11px}.lv-breadcrumb>button{font-size:12px}.topic-line{font-size:12px;line-height:1.8;margin-top:17px}.guide-progress{gap:5px;margin:19px 0 25px}.guide-progress button{font-size:10px;gap:6px;padding:0 5px}.guide-progress button span{width:23px;height:23px;font-size:9px}.lv-story-grid{grid-template-columns:1fr;gap:25px}.lv-instruction h1{font-size:34px;line-height:1.35;margin:14px 0 17px}.lv-task{font-size:15px;max-width:none}.instruction-bottom{display:none}.lv-deck{padding:21px}.map-title-row{display:block}.map-title-row h1{font-size:30px}.map-title-row>p{font-size:13px;max-width:none;margin:15px 0 0;display:block}.map-workspace{grid-template-columns:1fr}.map-inspector .comparison-row{grid-template-columns:repeat(3,1fr)}.map-inspector .comparison-row button{display:block}.map-inspector .comparison-row.two{grid-template-columns:repeat(2,1fr)}.map-inspector .comparison-row.five{grid-template-columns:repeat(5,1fr)}.map-inspector .comparison-row small{font-size:9px}.map-inspector .comparison-row strong{font-size:12px}.finish-recs{gap:10px}.player-map{display:none}.player-title{min-width:0}.player-ask{font-size:11px;padding:10px}.time{font-size:10px;min-width:80px}#player .player-top{gap:12px}.volume{display:none}.profile h1{font-size:35px}.profile-chart{gap:25px}.footer-note{display:flex;line-height:1.8}.synth-panel{padding:18px}.synth-choices button{font-size:12px}.knowledge h2{font-size:19px}.knowledge p{font-size:14px}.map-axis{font-size:10px}.map-lane>span{font-size:11px}.song-card h3{font-size:15px;line-height:1.5}}
@media(max-width:420px){.brand span{display:none}.guide-progress button{font-size:9px;padding:0 2px;gap:5px}.guide-progress button span{width:21px;height:21px}.song-navigation button{font-size:10px;padding:8px}.lv-instruction h1{font-size:30px;letter-spacing:-1px}.home-intro h1{font-size:36px}.mix-grid button{font-size:11px;padding:9px 10px}.deck-heading{font-size:11px}.deck-play{font-size:13px}.deck-play small{font-size:10px}.comparison-row strong{font-size:12px}.comparison-row small{font-size:10px}.lv-next-row .lv-primary{font-size:11px;padding:12px;max-width:83%}.card-question{font-size:15px!important}.song-card .tag{font-size:11px}.finish-recs{grid-template-columns:1fr}.map-inspector{padding:19px}.map-inspector .comparison-row.five{grid-template-columns:repeat(3,1fr)}.map-title-row h1{font-size:28px}.song-heading{gap:9px}.song-heading small{font-size:10px}.player-title{font-size:12px}.player-title small{font-size:9px}}

/* V4: one visual language, a full-song locator, and legible explanations. */
:root{--paper:#f5f1e8;--ink:#292e24;--muted:#69735f;--line:#d9decc;--accent:#dceb95;--focus:#af582d;--player-clearance:174px}
html{scroll-padding-bottom:var(--player-clearance)}
body{font-size:16px;line-height:1.75}
main{padding-bottom:calc(var(--player-clearance) + 34px)}
button{line-height:1.5}
button:focus-visible,a:focus-visible,input:focus-visible{outline-color:#9c4d26;outline-offset:4px}
button:disabled{cursor:wait}
header{gap:20px}
.brand{letter-spacing:-1.2px}
nav button{font-size:14px;letter-spacing:0}
.footer-note{font-size:13px;line-height:1.8}
.footer-note button{font-size:13px}
.home-intro>p,.home-description{font-size:16px;line-height:1.85}
.home-intro>p{max-width:290px}
.home-intro h1{font-size:clamp(40px,4.1vw,64px);letter-spacing:-2px}
.home-feature{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);min-height:470px;align-items:stretch}
.home-feature-copy{padding:34px 40px;min-width:0}
.home-feature-copy h2{font-size:38px;letter-spacing:-1.2px;line-height:1.1;margin:28px 0 8px}
.home-feature-copy h3{font-size:29px;line-height:1.5;margin:23px 0 14px;letter-spacing:-.5px}
.home-feature-copy .lv-primary{font-size:15px;min-height:48px;gap:18px;margin-top:auto}
.home-artist{font-size:14px}
.home-map-link{font-size:14px;min-height:38px;line-height:1.6;text-align:left}
.feature-kicker{font-size:12px;letter-spacing:.8px;flex-wrap:wrap;gap:12px}
.live-pill{font-size:11px}

/* A separate title strip keeps dark letterforms clear of the vinyl. */
.record-cover{--cover-title-height:132px;--cover-padding:26px;min-height:470px;isolation:isolate;background:var(--song-accent,#e4a376);color:#252c23;display:block}
.record-cover:after{z-index:3;opacity:.45}
.cover-meta{top:22px;left:var(--cover-padding);right:var(--cover-padding);z-index:4;gap:15px;align-items:flex-start;font-size:11px;line-height:1.5;letter-spacing:1.1px}
.cover-meta span{font-size:9px;text-align:right;max-width:48%;letter-spacing:1px}
.record-disc{z-index:1;left:50%;top:47px;width:min(69%,300px);height:auto;aspect-ratio:1;border-radius:50%;transform:translateX(-50%);box-shadow:13px 14px 0 #252a2112}
.record-label{font-size:24px;inset:34%;line-height:.95}
.record-label span{font-size:10px;margin-top:8px}
.cover-title{position:absolute;inset:auto 0 0;z-index:2;min-height:var(--cover-title-height);padding:19px var(--cover-padding) 22px;background:var(--song-accent,#e4a376);font-size:clamp(36px,4.1vw,61px);font-weight:600;letter-spacing:-2px;line-height:1.04;overflow-wrap:anywhere;text-wrap:balance}
.cover-title span{font-size:10px;letter-spacing:1.8px;line-height:1.5;margin-top:13px;font-weight:400}
.cover-coordinate{display:none}
.song-card{min-width:0;gap:0}
.song-card .record-cover{--cover-title-height:108px;--cover-padding:17px;min-height:280px;width:100%;border-radius:5px;transition:transform .2s ease}
.song-card:hover .record-cover{transform:translateY(-4px)}
.song-card .cover-meta{font-size:9px;top:15px;letter-spacing:.5px;gap:8px}
.song-card .cover-meta span{font-size:8px;letter-spacing:.3px;max-width:35%}
.song-card .record-disc{top:41px;width:min(64%,160px);box-shadow:8px 8px 0 #252a2112}
.song-card .record-label{font-size:14px;letter-spacing:-.4px}
.song-card .record-label span{font-size:7px;margin-top:5px}
.song-card .cover-title{font-size:27px;letter-spacing:-1px;line-height:1.05;padding-top:13px;padding-bottom:16px}
.song-card .cover-title span{font-size:8px;letter-spacing:1.1px;margin-top:10px}
.song-card h3{font-size:18px;line-height:1.45;margin-top:18px}
.song-card>p{font-size:13px;line-height:1.7}
.song-card .card-question{font-size:18px;line-height:1.65;min-height:60px;margin:16px 0}
.song-card .tag{font-size:13px;line-height:1.8;padding-top:13px}
.section-label{font-size:14px;letter-spacing:.7px}
.section-label small{font-size:13px;line-height:1.6}

.lv-breadcrumb{padding:19px 0;gap:15px}
.lv-breadcrumb>button{font-size:14px;min-height:42px}
.song-heading strong{font-size:17px;line-height:1.4}
.song-heading small{font-size:13px;line-height:1.5}
.song-navigation button{font-size:14px;padding:9px 15px;min-height:40px}
.topic-line{font-size:16px;line-height:1.8;margin:20px 0 0;color:#536145}
.topic-line span{font-size:11px;letter-spacing:.6px;padding:3px 7px}
.guide-progress{max-width:none;gap:20px;margin:25px 0 29px}
.guide-progress button{font-size:14px;padding:0 14px;min-height:40px;color:#647355;line-height:1.5}
.guide-progress button span{width:29px;height:29px;font-size:11px;flex-shrink:0}
.lv-story-grid{grid-template-columns:minmax(0,.9fr) minmax(0,1.2fr);gap:42px;max-width:none;align-items:start}
.chapter-eyebrow{font-size:12px;letter-spacing:1.3px;line-height:1.7}
.lv-instruction h1{font-size:clamp(34px,3.25vw,44px);font-weight:500;line-height:1.38;letter-spacing:-1.4px;margin:19px 0 22px;max-width:470px}
.lv-task{font-size:17px;line-height:1.9;color:#56644b;max-width:470px}
.lv-task strong{font-weight:600;color:#344a26}
.instruction-bottom{margin-top:24px;padding-top:18px}
.instruction-bottom button{font-size:14px;min-height:40px}
.lv-next-row{margin-top:24px;padding-top:20px;gap:16px}
.lv-next-row .lv-primary{font-size:14px;padding:13px 17px;min-height:47px;line-height:1.65;max-width:85%;gap:14px}
.lv-back{font-size:14px;min-height:42px;white-space:nowrap}

/* Shared, full-width orientation above the listening workbench. */
.song-overview{background:#eceee2;border:1px solid #d4dac4;border-radius:7px;padding:21px 24px 19px;margin:0 0 30px;min-width:0}
.overview-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:16px}
.overview-head h2{font-size:17px;line-height:1.5;font-weight:600;margin:0 0 4px;letter-spacing:0}
.overview-head p{font-size:14px;color:#66745a;line-height:1.65;margin:0}
.overview-head time,.overview-head>.mono,.overview-head>span{font-size:13px;font-family:'Space Grotesk',monospace;color:#51663e;line-height:1.6;white-space:nowrap}
.full-timeline{height:94px;position:relative;isolation:isolate;background:#f8f7ef;border:1px solid #cdd5bc;border-radius:4px;min-width:0}
.full-timeline>svg{display:block;width:100%;height:100%;position:absolute;inset:0;pointer-events:none;color:#9ba888}
.full-timeline>svg path{vector-effect:non-scaling-stroke}
.timeline-window{position:absolute;top:0;bottom:0;z-index:2;min-width:3px;padding:0;background:#8ca15b23;border:1px solid #718e4477;border-radius:1px;color:#3e5529;display:flex;align-items:flex-start;justify-content:center;overflow:visible;transition:background .15s,border-color .15s;cursor:pointer}
.timeline-window:hover{background:#9fae7370;border-color:#597538}
.timeline-window.selected,.timeline-window.active,.timeline-window[aria-pressed=true]{background:#cf784447;border:2px solid #b16536;color:#7b371a;z-index:3}
.timeline-window>span,.timeline-window>b{position:absolute;top:7px;left:50%;transform:translateX(-50%);font-size:11px;line-height:20px;min-width:20px;text-align:center;font-weight:600;border:1px solid #94a671;border-radius:3px;background:#f5f7e8;padding:0 3px;pointer-events:none}
.timeline-window.selected>span,.timeline-window.active>span,.timeline-window[aria-pressed=true]>span{color:#fff6ea;background:#a9532a;border-color:#a9532a}
.timeline-cursor,.position-marker,.overview-cursor{position:absolute;top:-3px;bottom:-3px;z-index:5;width:2px;background:#a84f25;pointer-events:none;transform:translateX(-1px)}
.timeline-cursor:before,.position-marker:before,.overview-cursor:before{content:'';position:absolute;top:-3px;left:-3px;width:8px;height:8px;background:#a84f25;transform:rotate(45deg);border-radius:1px}
.timeline-ticks{display:flex;justify-content:space-between;font:12px/1.5 'Space Grotesk',monospace;color:#718060;margin-top:8px;position:relative}
.timeline-legend{display:flex;flex-wrap:wrap;gap:9px 16px;margin-top:15px;align-items:stretch}
.timeline-legend button,.timeline-legend>div{display:flex;gap:9px;align-items:center;padding:9px 11px;border:1px solid #c6d0b4;border-radius:4px;background:#f8f7ef;text-align:left;min-height:43px;font-size:14px;line-height:1.6}
.timeline-legend button.selected,.timeline-legend button.active,.timeline-legend button[aria-pressed=true]{border-color:#af582d;background:#f4e1cd;color:#6c341c}
.timeline-legend strong,.timeline-legend b{font-size:13px;font-weight:600}
.timeline-legend time,.timeline-legend small{font:12px/1.5 'Space Grotesk',monospace;white-space:nowrap;color:#6f7b60}
.timeline-legend span{line-height:1.6}
.timeline-note{font-size:13px;color:#6c785f;line-height:1.75;margin:12px 0 0}

/* These four lanes share the visible clip and respond to actual mix state. */
.lv-deck{padding:23px 25px 21px;border-radius:7px;background:#2a3126;color:#f0f3e4;position:relative;overflow:hidden;box-shadow:0 8px 22px #28312408}
.deck-heading{font-size:13px;line-height:1.6;gap:16px;color:#bac8a8;align-items:flex-start;letter-spacing:0}
.deck-heading>span:last-child{white-space:nowrap;font-variant-numeric:tabular-nums}
.stem-lanes{position:relative;display:grid;gap:8px;margin:19px 0 22px;min-width:0}
.stem-lane{--lane-color:#cddd93;display:grid;grid-template-columns:72px minmax(0,1fr);gap:13px;align-items:center;min-height:41px;transition:opacity .18s;position:relative}
.stem-lane[data-track=drums]{--lane-color:#e7ae7d}
.stem-lane[data-track=bass]{--lane-color:#c7dd8e}
.stem-lane[data-track=vocals]{--lane-color:#afc8cf}
.stem-lane[data-track=other]{--lane-color:#d0b8d1}
.stem-lane>label,.stem-lane>span{display:flex;align-items:center;gap:7px;font-size:13px;line-height:1.55;color:#d4dfc9;min-width:0}
.stem-lane>label:before,.stem-lane>span:before{content:'';height:6px;width:6px;border-radius:50%;flex-shrink:0;background:var(--lane-color)}
.stem-lane .lane-plot{position:relative;min-width:0;width:100%;height:41px;border-bottom:1px solid #e6eacb15;background:#eff5da04;border-radius:2px}
.stem-lane svg{display:block;width:100%;height:41px;color:var(--lane-color);overflow:hidden;opacity:.85}
.stem-lane.off svg{opacity:.11}
.stem-lane.off>label,.stem-lane.off>span{color:#919b85}
.stem-lane.off>label:before,.stem-lane.off>span:before{background:#7b8870}
.lane-cursor{position:absolute;z-index:3;top:0;bottom:0;width:1px;background:#f4f4df;pointer-events:none;box-shadow:0 0 5px #f5efd23b}
.stem-lanes>.lane-cursor{left:85px}
.deck-controls{gap:14px;align-items:center}
.deck-play{font-size:16px;min-height:48px;line-height:1.5;gap:12px}
.deck-play small{font-size:12px;color:#becbab;line-height:1.65;max-width:280px;margin-top:4px}
.play-glyph{height:45px;width:45px}
.deck-loop{font-size:13px;min-height:42px;white-space:nowrap}
.deck-foot{font-size:12px;color:#c1ceaf;line-height:1.8;margin-top:13px}
.mix-grid{gap:8px;margin-top:19px;padding-top:18px;border-color:#667452}
.mix-grid button{font-size:14px;line-height:1.5;padding:9px 12px;min-height:43px;color:#dce5cb;border-color:#798867}
.mix-grid button.selected{background:#e2edb3;color:#2e4121;border-color:#e2edb3}
.mute-controls{gap:10px;margin-top:14px}
.mute-switch{font-size:15px;line-height:1.5;min-height:49px;padding:12px 15px}
.mute-switch.off{color:#718064}
.mix-note{font-size:14px;color:#60714f;line-height:1.8}
.comparison-row{gap:10px;margin-top:16px}
.comparison-row button{padding:14px 13px;min-height:106px}
.comparison-row button>span{font-size:12px;color:#63764d;margin-bottom:8px}
.comparison-row strong{font-size:15px;line-height:1.55;font-weight:500}
.comparison-row small{font-size:12px;line-height:1.5;color:#667958;margin-top:8px;font-variant-numeric:tabular-nums}
.comparison-row .selected{border-color:#aa6033;background:#f0dfcd}
.comparison-row .selected>span{color:#944e28}
.comparison-row.five{gap:7px}
.comparison-row.five button{min-height:105px;padding:12px 9px;transform:none!important}
.comparison-row.five strong{font-size:14px}
.comparison-row.five small{font-size:11px}
.ladder-wrap{padding-top:6px}
.compare-actions button{font-size:14px;min-height:44px;line-height:1.5}
.compare-state{font-size:14px;line-height:1.7;min-height:24px;margin-top:11px;color:#596f44}
.arrange-choices button{font-size:15px;line-height:1.7;padding:14px}
.arrange-choices small{font-size:12px;line-height:1.65}

/* Theory is visible and follows the audible comparison, with one shared grid. */
.theory-panel{margin-top:34px;padding:28px 30px 27px;border:1px solid #d0d9bf;border-radius:7px;background:#edf0e2;min-width:0;scroll-margin-top:24px}
.theory-heading{margin-bottom:24px}
.theory-heading .kicker,.theory-heading .eyebrow,.theory-heading>span{font-size:12px;letter-spacing:1px;color:#718459;line-height:1.65}
.theory-heading h2{font-size:27px;line-height:1.5;letter-spacing:-.6px;font-weight:500;margin:8px 0 0;max-width:900px}
.theory-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.15fr);gap:25px;align-items:stretch}
.theory-terms,.term-list{display:grid;gap:12px;align-content:start}
.term-card{background:#faf9f1;border:1px solid #d6ddc8;border-radius:5px;padding:18px 20px;margin-bottom:12px;min-width:0}
.term-card:last-child{margin-bottom:0}
.term-card h3,.term-card>strong{display:block;font-size:18px;font-weight:600;line-height:1.55;color:#354b28;margin:0 0 7px}
.term-card h3 small,.term-card>strong small{font-size:12px;font-weight:400;color:#7a8868;margin-left:8px}
.term-card p{font-size:16px;line-height:1.9;color:#57654e;margin:0}
.term-card p+p{margin-top:9px}
.term-card em{font-style:normal;color:#92522c}
.theory-figure{margin:0;padding:20px;border:1px solid #c7d2b4;border-radius:5px;background:#f7f7ed;min-width:0;display:flex;flex-direction:column;justify-content:center;overflow:hidden}
.theory-figure svg{width:100%;height:auto;display:block;flex-shrink:0;overflow:visible}
.theory-figure svg text{font-family:'DM Sans','PingFang SC','Microsoft YaHei',sans-serif}
.theory-figure figcaption,.theory-figure .figure-caption,.theory-figure>p{font-size:14px;line-height:1.8;color:#687956;margin:15px 0 0}
.theory-figure h3{font-size:17px;font-weight:500;margin:0 0 17px;color:#475c35;line-height:1.6}
.theory-explanation{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin-top:23px;padding-top:22px;border-top:1px solid #cfd8bd}
.theory-explanation .heard,.theory-explanation .reason{min-width:0}
.theory-explanation h3,.theory-explanation strong{display:block;font-size:16px;line-height:1.6;font-weight:600;color:#455c33;margin:0 0 8px}
.theory-explanation p{font-size:16px;line-height:1.9;color:#58674d;margin:0}
.theory-explanation p+p{margin-top:10px}
.theory-explanation li{font-size:16px;line-height:1.9;color:#58674d}
.theory-explanation ul{padding-left:20px;margin:8px 0}
.listen-again{display:inline-flex;align-items:center;gap:12px;margin-top:22px;padding:12px 17px;border:1px solid #889d6c;border-radius:4px;color:#3f582b;background:#e5edcf;font-size:14px;min-height:45px;line-height:1.65;text-align:left}
.theory-takeaway,.theory-summary{padding:17px 20px;border-left:3px solid #91a660;background:#e2e9d1;margin:21px 0 0;font-size:17px;line-height:1.85;color:#3d532c}
.synth-panel{padding:23px;background:#e8eedc;border-color:#c5d2ae}
.synth-kicker,.synth-legend{font-size:13px;line-height:1.8}
.synth-choices button{font-size:15px;min-height:54px;line-height:1.6}
.synth-choices small{font-size:12px;line-height:1.7}
.synth-status,.synth-help{font-size:14px;line-height:1.85}
.synth-panel svg{min-height:120px}
.takeaway p{font-size:18px;line-height:1.85;color:#425935}
.finish-actions button{font-size:14px;min-height:46px}
.next-card strong{font-size:17px}
.next-card p{font-size:14px;line-height:1.8}
.next-card small{font-size:12px}

/* Map and transport keep the same accessible type scale. */
.map-title-row>p,.map-inspector>p{font-size:16px;line-height:1.85}
.map-key button{font-size:15px;line-height:1.7;min-height:58px}
.map-key small{font-size:12px}
.map-lane>span{font-size:13px}
.map-axis{font-size:12px}
.sound-map>p{font-size:13px;line-height:1.8;color:#bdcaaa}
.map-return,.inspector-head,.inspector-head>button{font-size:14px;line-height:1.7}
.map-seek-wrap button{font-size:14px}
#player{padding:14px 5% 16px;box-shadow:0 -4px 18px #25302112}
#player .player-top{gap:17px;max-width:1440px;margin:auto;min-height:44px}
.player-title{min-width:170px;font-size:14px;line-height:1.4}
.player-title small{font-size:11px;line-height:1.5;color:#b9c6aa}
.time{font-size:12px;min-width:95px}
.player-map{font-size:13px;min-height:40px}
.player-bottom{max-width:1440px;margin:6px auto 0;font-size:11px;color:#b7c3a6;line-height:1.6}
.marker-row{height:16px}
.marker-row button{font-size:10px;min-width:20px;line-height:1.4}
.timeline input{min-height:24px}
.drawer .fine,.drawer .source-link{font-size:14px;line-height:1.9}

@media(min-width:1450px){
 .record-cover{min-height:480px}.record-disc{width:310px}.cover-title{font-size:61px}
 .song-card .record-cover{min-height:300px;--cover-title-height:115px}.song-card .record-disc{width:170px}.song-card .cover-title{font-size:30px}
}
@media(max-width:1100px){
 .home-feature-copy{padding:30px}.home-feature-copy h3{font-size:26px}
 .record-cover{min-height:455px}.record-disc{width:69%;top:63px}.cover-title{font-size:44px}
 .song-card .record-cover{min-height:255px;--cover-padding:14px;--cover-title-height:108px}.song-card .record-disc{width:64%;top:41px}.song-card .cover-title{font-size:25px}
 .lv-story-grid{gap:27px;grid-template-columns:minmax(0,.92fr) minmax(0,1.1fr)}
 .lv-instruction h1{font-size:36px}.lv-task{font-size:16px}
 .guide-progress{gap:8px}.guide-progress button{font-size:13px;padding:0 9px}
 .lv-deck{padding:21px}.mix-grid button{font-size:13px;padding:9px 10px}
 .comparison-row strong{font-size:14px}.comparison-row small{font-size:11px}
 .theory-panel{padding:26px}.theory-grid,.theory-explanation{gap:19px}
 .player-title{min-width:140px}.player-map{font-size:12px}
}
@media(max-width:900px){
 .cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 22px}
 .song-card .record-cover{--cover-title-height:114px;min-height:310px;--cover-padding:20px}.song-card .record-disc{width:180px;top:42px}.song-card .cover-title{font-size:32px}
 .song-card .cover-meta{font-size:10px}.song-card .record-label{font-size:17px}
 .home-feature-copy h2{font-size:34px}.home-feature-copy h3{font-size:25px}
 .overview-head{gap:15px}.overview-head p{font-size:14px}
 .song-navigation button{font-size:13px;padding:9px 12px}
 .song-heading strong{font-size:15px}.song-heading small{font-size:12px}
 .theory-grid{grid-template-columns:1fr 1fr}.theory-figure{padding:14px}.term-card{padding:16px}
 .theory-heading h2{font-size:25px}.theory-explanation{grid-template-columns:1fr;gap:17px}
 .comparison-row.five{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:760px){
 :root{--player-clearance:190px}
 header{height:74px;gap:14px}nav{gap:16px}nav button{font-size:13px}.brand{font-size:23px}.brand span{font-size:9px;margin-left:10px}
 .home-intro{padding:31px 0;gap:20px}.home-intro h1{font-size:42px;line-height:1.22}.home-intro>p{display:block;font-size:15px;max-width:100%;line-height:1.8}
 .home-feature{grid-template-columns:1fr}.record-cover{--cover-title-height:125px;--cover-padding:24px;min-height:425px}
 .record-disc{top:43px;left:50%;width:250px;transform:translateX(-50%)}.cover-title{font-size:48px;letter-spacing:-1.5px;padding-bottom:22px}.cover-meta{font-size:11px;top:20px}
 .home-feature-copy{padding:27px}.home-feature-copy h2{font-size:36px;margin-top:24px}.home-feature-copy h3{font-size:26px}.home-description{font-size:15px;margin-bottom:22px}.home-feature-copy .lv-primary{font-size:15px}
 .song-card .record-cover{min-height:285px;--cover-title-height:114px;--cover-padding:16px}.song-card .record-disc{width:155px;top:40px}.song-card .cover-title{font-size:27px}.song-card .record-label{font-size:15px}
 .song-card .card-question{font-size:17px;min-height:56px;margin:15px 0}.song-card .tag{font-size:13px}.song-card h3{font-size:17px}
 .section-label{align-items:flex-start;gap:12px;line-height:1.6;font-size:13px}.section-label small{font-size:12px;max-width:190px;text-align:right}
 .lv-breadcrumb{padding:16px 0;gap:12px;flex-wrap:wrap}.lv-breadcrumb>button{font-size:14px;min-height:40px}
 .song-heading{display:flex;order:3;gap:12px;width:100%;padding-top:12px;margin:0;align-items:baseline}.song-heading strong{font-size:16px}.song-heading small{font-size:12px}
 .song-navigation button{font-size:12px;min-height:37px;padding:8px 11px}
 .topic-line{font-size:15px;line-height:1.8;margin-top:17px;align-items:flex-start;gap:10px}.topic-line span{font-size:10px;white-space:nowrap;margin-top:3px}
 .guide-progress{gap:0;margin:20px 0 22px;justify-content:space-between;align-items:flex-start}.guide-progress:before{top:14px}
 .guide-progress button{flex:1;flex-direction:column;padding:0 3px;gap:8px;line-height:1.4;font-size:12px;text-align:center;max-width:25%;min-height:56px}
 .guide-progress button span{width:27px;height:27px;font-size:11px}
 .song-overview{padding:18px 16px 16px;margin-bottom:25px}.overview-head{display:block;margin-bottom:14px}.overview-head h2{font-size:16px}.overview-head p{font-size:13px;line-height:1.8}.overview-head time,.overview-head>.mono,.overview-head>span{display:block;font-size:12px;margin-top:5px}
 .full-timeline{height:81px}.timeline-ticks{font-size:10px;margin-top:7px}.timeline-window>span,.timeline-window>b{top:7px;font-size:10px;line-height:18px;min-width:18px}
 .timeline-legend{gap:8px;margin-top:13px}.timeline-legend button,.timeline-legend>div{padding:8px 10px;font-size:13px;gap:7px;flex:1 1 auto}.timeline-legend time,.timeline-legend small{font-size:11px}.timeline-note{font-size:12px}
 .lv-story-grid{grid-template-columns:1fr;gap:23px}.lv-instruction h1{font-size:34px;line-height:1.4;letter-spacing:-1px;margin:15px 0 17px;max-width:none}.lv-task{font-size:16px;line-height:1.9;max-width:none}.chapter-eyebrow{font-size:11px}
 .instruction-bottom{display:flex;margin-top:16px;padding-top:12px}.instruction-bottom button{font-size:13px}
 .lv-deck{padding:21px}.deck-heading{font-size:12px}.deck-play{font-size:16px}.deck-play small{font-size:12px}.deck-loop{font-size:12px;padding:8px 9px;min-height:40px}.deck-foot{font-size:12px}
 .stem-lanes{gap:8px;margin-top:17px;margin-bottom:20px}.stem-lane{grid-template-columns:68px minmax(0,1fr);gap:11px}.stem-lane>label,.stem-lane>span{font-size:12px;gap:6px}.stem-lanes>.lane-cursor{left:79px}
 .mix-grid{gap:8px}.mix-grid button{font-size:13px;padding:9px 11px;min-height:42px}.mute-switch{font-size:14px;min-width:125px;min-height:48px}.mix-note{font-size:14px}
 .comparison-row button{padding:13px 10px;min-height:104px}.comparison-row strong{font-size:14px}.comparison-row small{font-size:11px;line-height:1.7}.comparison-row button>span{font-size:11px}.compare-actions button{font-size:13px}.compare-state{font-size:13px}
 .comparison-row.five{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.comparison-row.five button{min-height:95px}.comparison-row.five strong{font-size:14px}.comparison-row.five small{font-size:11px}
 .lv-next-row{margin-top:22px;padding-top:18px}.lv-next-row .lv-primary{font-size:14px;line-height:1.65;max-width:85%;padding:12px 15px}.lv-back{font-size:13px}
 .theory-panel{margin-top:27px;padding:23px 20px}.theory-heading{margin-bottom:20px}.theory-heading h2{font-size:24px;line-height:1.5}.theory-heading .kicker,.theory-heading .eyebrow,.theory-heading>span{font-size:11px}
 .theory-grid{grid-template-columns:1fr;gap:16px}.theory-terms,.term-list{gap:10px}.term-card{padding:17px 18px}.term-card h3,.term-card>strong{font-size:17px}.term-card p{font-size:16px;line-height:1.9}.theory-figure{padding:18px}.theory-figure figcaption,.theory-figure .figure-caption,.theory-figure>p{font-size:13px}
 .theory-explanation{grid-template-columns:1fr;margin-top:20px;padding-top:19px;gap:20px}.theory-explanation p,.theory-explanation li{font-size:16px;line-height:1.9}.theory-explanation h3,.theory-explanation strong{font-size:16px}
 .listen-again{font-size:14px;padding:11px 14px;max-width:100%}.theory-takeaway,.theory-summary{font-size:16px;padding:15px 17px;line-height:1.85}
 .synth-panel{padding:20px}.synth-choices button{font-size:14px}.synth-choices small{font-size:12px}.synth-help,.synth-status{font-size:14px}.synth-legend{font-size:12px}
 .map-title-row>p,.map-inspector>p{display:block;font-size:15px}.map-key button{font-size:14px}.map-key small{font-size:11px}.map-inspector .comparison-row{grid-template-columns:repeat(3,minmax(0,1fr))}.map-inspector .comparison-row button{min-width:0;min-height:95px;display:block}.map-inspector .comparison-row strong{font-size:13px}.map-inspector .comparison-row small{font-size:10px}
 .map-inspector .comparison-row.five{grid-template-columns:repeat(3,minmax(0,1fr))}.map-return,.inspector-head,.inspector-head>button{font-size:13px}.map-seek-wrap button{font-size:13px}
 #player{padding-top:12px;padding-bottom:max(13px,env(safe-area-inset-bottom))}#player .player-top{gap:11px}.player-title{font-size:13px;min-width:0;flex:1}.player-title small{font-size:11px}.time{font-size:11px;min-width:88px}.player-map{display:none}.player-bottom{font-size:10px;line-height:1.7;display:none}
 .footer-note{font-size:12px;line-height:1.9}.footer-note button{font-size:12px}
}
@media(max-width:420px){
 header{margin-left:5%;margin-right:5%}.brand{font-size:22px}.brand span{display:none}nav button{font-size:12px}nav{gap:12px}
 .home-intro h1{font-size:37px}.home-intro>p{font-size:15px}.home-feature-copy{padding:24px}.home-feature-copy h2{font-size:32px}.home-feature-copy h3{font-size:25px}.home-feature-copy .lv-primary{font-size:14px}
 .record-cover{min-height:391px;--cover-title-height:122px;--cover-padding:22px}.record-disc{top:48px;width:222px}.record-label{font-size:21px}.cover-title{font-size:43px;letter-spacing:-1.4px}.cover-meta{font-size:10px}.cover-meta span{font-size:8px}
 .cards{gap:26px 13px}.song-card .record-cover{min-height:235px;--cover-title-height:106px;--cover-padding:12px}.song-card .cover-meta{font-size:8px;top:12px;letter-spacing:0}.song-card .cover-meta span{display:none}.song-card .record-disc{top:32px;width:107px}.song-card .record-label{font-size:11px}.song-card .record-label span{font-size:6px;margin-top:3px}.song-card .cover-title{font-size:22px;letter-spacing:-.7px;padding-top:12px;line-height:1.1}.song-card .cover-title span{font-size:7px;letter-spacing:.7px;margin-top:9px}.song-card h3{font-size:16px}.song-card>p{font-size:12px}.song-card .card-question{font-size:16px!important;line-height:1.65;min-height:79px}.song-card .tag{font-size:12px}
 .lv-breadcrumb{gap:10px}.lv-breadcrumb>button{font-size:13px}.song-navigation button{font-size:12px;padding:8px 9px}.song-heading{gap:10px}.song-heading strong{font-size:15px}.song-heading small{font-size:11px}.topic-line{font-size:14px;gap:9px}
 .guide-progress button{font-size:11px;gap:8px}.guide-progress button span{width:26px;height:26px;font-size:10px}.lv-instruction h1{font-size:31px;line-height:1.4}.lv-task{font-size:16px}
 .song-overview{padding:16px 13px}.timeline-legend{gap:7px}.timeline-legend button,.timeline-legend>div{font-size:12px;padding:8px;gap:6px}.timeline-legend time,.timeline-legend small{font-size:10px}.full-timeline{height:76px}
 .lv-deck{padding:18px 16px}.deck-heading{font-size:11px;gap:8px}.deck-play{font-size:15px;gap:10px}.deck-play small{font-size:11px;max-width:200px}.deck-loop{font-size:12px}.play-glyph{width:41px;height:41px}.stem-lane{grid-template-columns:66px minmax(0,1fr);gap:8px}.stem-lane>label,.stem-lane>span{font-size:12px}.stem-lanes>.lane-cursor{left:74px}
 .mix-grid{gap:7px}.mix-grid button{font-size:12px;padding:9px 10px}.mute-controls{gap:8px}.mute-switch{min-width:117px;padding:11px 12px;font-size:13px;gap:10px}.comparison-row{gap:7px}.comparison-row button{padding:12px 9px;min-height:112px}.comparison-row strong{font-size:13px}.comparison-row small{font-size:10px}.comparison-row.two strong{font-size:14px}.compare-actions button{font-size:13px;padding:10px 11px}
 .lv-next-row .lv-primary{font-size:13px;max-width:82%;padding:12px 13px}.theory-panel{padding:21px 17px}.theory-heading h2{font-size:23px}.term-card{padding:15px}.theory-figure{padding:14px}.term-card p,.theory-explanation p,.theory-explanation li{font-size:15px;line-height:1.95}.term-card h3,.term-card>strong{font-size:17px}.listen-again{font-size:13px;padding:11px 12px}.theory-takeaway,.theory-summary{font-size:16px}
 .finish-recs{grid-template-columns:1fr}.synth-panel{padding:17px}.synth-choices button{font-size:14px;padding:12px}.synth-status{font-size:13px}.synth-help{font-size:13px}
 .player-title{font-size:13px}.player-title small{font-size:10px}.time{font-size:11px;min-width:85px}#player .player-btn{height:39px;width:39px}.timeline{margin-top:1px}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

/* V4 content diagrams and the final shared markup. */
.stem-lane>span{display:grid;grid-template-columns:6px minmax(0,1fr);column-gap:7px;row-gap:2px;line-height:1.4}
.stem-lane>span:before{grid-column:1;grid-row:1;align-self:center}
.track-status{grid-column:2;font-size:10px;line-height:1.4;letter-spacing:.2px;color:#b6c7a0}
.stem-lane.off .track-status{color:#909b84}
.stem-caption{font-size:12px;line-height:1.85;color:#bdcbaa;margin:-6px 0 18px}
.knowledge-anchor{display:inline-block;font-size:14px;line-height:1.8;color:#597343;border-bottom:1px solid #a2b48a;margin-top:24px;padding:4px 0 6px;scroll-margin-top:20px}
.knowledge-anchor:hover{color:#334f20;border-color:#587a37}
.listen-again{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;margin-top:23px;padding:17px 19px;background:#e3ead2;border:0;box-shadow:inset 3px 0 #99ad6e}
.listen-again p{flex:1;min-width:230px;font-size:15px;line-height:1.85;color:#50673a;margin:0}
.listen-again button{font-size:14px;line-height:1.6;min-height:45px;padding:11px 15px;border:1px solid #8ba268;border-radius:4px;background:#f6f7eb;color:#3a5726;flex-shrink:0;text-align:left}
.listen-again button:hover{background:#d6e2b9}
.concept-matrix{--cells:8;--row-label:86px;min-width:0;display:grid;gap:9px;margin:4px 0}
.concept-row{display:grid;grid-template-columns:var(--row-label) repeat(var(--cells),minmax(0,1fr));gap:5px;align-items:stretch;min-width:0}
.concept-row>strong{font-size:13px;line-height:1.6;font-weight:500;align-self:center;color:#50623d;overflow-wrap:anywhere;padding-right:4px}
.concept-row>b{font-size:13px;line-height:1.5;font-family:'Space Grotesk','Microsoft YaHei',monospace;font-weight:500;color:#65794c;text-align:center;display:flex;align-items:center;justify-content:center;min-height:24px}
.concept-row>b:nth-child(2n){color:#344b25;font-weight:600}
.concept-cell{display:flex;align-items:center;justify-content:center;min-width:0;min-height:39px;padding:6px 3px;font-size:13px;font-weight:400;line-height:1.6;text-align:center;border:1px solid #d9dfca;border-radius:3px;background:#eeefe3;color:#93a37d;overflow-wrap:anywhere}
.concept-cell.filled{background:#607746;color:#f4f8e8;border-color:#607746}
.concept-row:nth-child(3) .concept-cell.filled{background:#9a643e;border-color:#9a643e;color:#fff4e9}
.concept-row:nth-child(4) .concept-cell.filled{background:#687e82;border-color:#687e82;color:#f0f9f7}
.concept-note{font-size:12px;line-height:1.75;color:#79876c;margin:0 0 5px calc(var(--row-label) + 5px)}
.theory-panel>.theory-grid:has(.concept-matrix){grid-template-columns:minmax(0,.95fr) minmax(0,1.2fr)}
@media(max-width:1100px){.concept-matrix{--row-label:75px}.concept-row{gap:4px}.concept-row>strong{font-size:12px}.concept-cell{font-size:12px;min-height:37px}.listen-again p{font-size:15px}}
@media(max-width:760px){
 .theory-panel>.theory-grid:has(.concept-matrix){grid-template-columns:1fr}
 .concept-matrix{--row-label:79px}.concept-row{gap:4px}.concept-cell{min-height:38px;font-size:12px}.concept-row>strong{font-size:12px}.concept-row>b{font-size:12px}
 .knowledge-anchor{font-size:13px;margin-top:18px}.listen-again{gap:14px;padding:16px;margin-top:20px}.listen-again p{font-size:15px;min-width:0;flex-basis:100%}.listen-again button{font-size:13px;min-height:44px}.stem-caption{font-size:12px}
}
@media(max-width:420px){
 .concept-matrix{--row-label:64px;gap:8px}.concept-row{gap:3px}.concept-row>strong{font-size:11px;line-height:1.65;padding-right:2px}.concept-row>b{font-size:11px}.concept-cell{font-size:11px;min-height:33px;padding:5px 2px}.concept-note{font-size:11px;margin-left:0;line-height:1.8}
 .track-status{font-size:9px}.stem-caption{font-size:11px;line-height:1.85}.knowledge-anchor{font-size:13px}.listen-again p{font-size:14px}.listen-again button{font-size:13px;width:100%}
}

/* Give the explanation enough space for the complete reasoning. */
@media(min-width:901px){.theory-explanation{grid-template-columns:minmax(0,.72fr) minmax(0,1.5fr)}}